低频水声声压校准测试系统的设计

水声声压是声学测量中应用最广泛的参数，对声压的测量又是通过测量水听器的声压灵敏度来完成的。声学计量检定系统中对低频水声声压灵敏度的校准有多种方法，应用振动液柱法校准低频水听器的声压灵敏度是常用方法之一。伴随着新型器件、新材料和数据采集器的应用，笔者根据振动液柱法的数学模型，初步设计了一套测试系统。本文给出测试系统实现原理和系统框图，并对其不确定度进行了分析评定，同时给出测试系统能达到的技术指标。

Testing system design for low frequency underwater acoustics pressure calibration

The underwater acoustics pressure is the most widely used parameter in the acoustical measurement, and the acoustics pressure is determined through measuring the acoustics pressure sensitivity of hydrophone. There are many methods to calibrate low frequency underwater acoustics pressure in the metrological verification system for acoustics. One of those popular methods calibrating the acoustics pressure sensitivity of low frequency hydrophone is vibration fluid column method. Along with those applications of new devices, new materials and data acquisition, a preliminary testing system was designed according to the mathematical model of vibration fluid column method. The implementation principle and diagram of this testing system were described, its uncertainty was evaluated, and its available technical indictors were introduced too.